Description

The TPS61322xx is a synchronous boost converter with only 6.5-µA quiescent current. The TPS61322xx provides a power-supply solution for products powered by alkaline battery, NiMH rechargeable battery, or one-cell Li-ion battery. The boost converter is based on a hysteretic control topology using synchronous rectification to obtain maximum efficiency at minimal quiescent current. The TPS61322xx also allows the use of small external inductor and capacitors. Higher than 90% efficiency is achieved at 10mA load from 1.5-V input to 2.2-V output conversion.

The TPS61322xx can also support high output current applications with an external schottky diode. The TPS613222A provides higher than 500 mA output current capability at 3.0 V input voltage to 5.0 V output voltage conversion with an external schottky diode in parallel with the internal rectifier FET.

The output voltage is set internally to a fixed output voltage from 1.8 V to 5.5 V in increment of 0.1 V. Thus it only needs two external components to get the desired output voltage. The TPS61322xx also implements thermal shutdown protection function.

The TPS61322xx is available in a 2.9-mm × 1.3-mm 3-pin SOT package or a 2.9-mm × 1.6-mm 5-pin SOT package.

Features

Operating Input Voltage Range: 0.9 V to 5.5 V

Output Voltage Range: 1.8 V to 5.5 V

6.5-µA Quiescent Current into VOUT Pin

±3% Output Voltage Accuracy over Temperature

Minimum Switch Peak Current Limit:

0.42 A for TPS613223A

0.5 A for TPS61322

0.75 A for TPS613221A and TPS613226A

1.10 A for TPS613222A

Higher than 90% Efficiency at 10 mA Load from 1.5-V to 2.2-V Conversion